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Toshiba 65H83 is flickering after maybe an hour on. Is this a convergence chip issue?

I dont know what happened to my last post. None the less. After about an hour on my TV will start to flash or flicker while I am on any input. I dont know if its a convergence chip issue or an over heating issue or both. If I unplug the tv for a 10 min everything seems to be okay for about an hour and it starts happening again. I have tried resetting the tv by keeping it unplugged for a few days but still the same issue happens. What should I do to fix this issue?

Posted by Adam Damron on

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Abdul Rasheed

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Seems the like the backlighting LEDs are messing up. either there is a short circuit or some of the LEDs are dying off when hot.

Posted on Jun 15, 2021

  • Adam Damron
    Adam Damron Jun 15, 2021

    This is a rear projection tv. I don't think it has LEDs.

  • Abdul Rasheed Jun 27, 2021

    Oh sorry I did not check the model number. Projection TVs used high powered lamps that needs to be cooled by
    fans installed near it. Check to see if the fans has failed. If I remember right, these lamps are powered by separate driver circuits. Check for heat build up in the electronics area.

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The Knight

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Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the brand name of your set, in its search bar at the right side column, and press enter. See it in Webview by mobile. Mobile View has no search box.

Posted on Jun 15, 2021

  • Adam Damron
    Adam Damron Jun 15, 2021

    Thank you I will try this and see if it works. This is a reprojection tv just to be 100% transparent with you.

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